/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import com.google.gson.Gson;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import jsonHelper.SimpleTag;
import service.Tag;
import service.TagFacadeREST;

/**
 *
 * @author andrew
 */
public class manageTagServlet extends HttpServlet {

   @EJB
   private TagFacadeREST tagManager;

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
        // restituisce un array con tutti i tag presenti nel sistema
        List<Tag> listTag = tagManager.findAll();
        
        Gson gson = new Gson();
        
        response.setCharacterEncoding("UTF-8");
        PrintWriter out = response.getWriter();
        
        ArrayList<SimpleTag> arraySimpleTag = new ArrayList<SimpleTag>();
        
        Iterator<Tag> itTag = listTag.iterator();
        while(itTag.hasNext()){
            Tag tag = itTag.next();
            
            SimpleTag st = new SimpleTag();
            
            st.setIdTag(tag.getIdTag());
            st.setTagValue(tag.getDescription());
            
            arraySimpleTag.add(st);
            
        }
        
        String StringToClient = gson.toJson(arraySimpleTag);
        // restituzione JSON
        out.println(StringToClient);
        out.close();
        
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
